如何在Windows中的python中處理文件上傳？

Question

我將HTML表單發布到在簡單的python服務器上運行的python腳本。 一個帖子請求中最多可發布10個文件。 圖像數據的訪問方式如下：

import cgi
# simple post data access
form = cgi.FieldStorage()
imgfieldname = "image1"
imagedata = form[imgfieldname].file.read()

# size varies for the same source image file for different uploads
# on Win7 for no obvious reason
size = len(imagedata)

# save image data to file, results in an truncated image on Win7
# as the image is already truncated when read from form above
fh = open("image1", "wb")
fh.write(imagedata)
fh.close()

上面的代碼在Mac OS 10.8下的Python 3.2.3上運行良好。 我在Win7中的Python 3.2.3下得到了隨機錯誤。 文件上傳不是隨機完成的。 我有時會上傳完整的文件，有時會得到一個截斷的文件。

發布數據的HTML表單如下所示：

<form action="/cgi-bin/save.py" method="post" name="Formular" id="Formular"  enctype="multipart/form-data">
<input type="file" formenctype="multipart/form-data" name="image1"/>
<input type="file" formenctype="multipart/form-data" name="image2"/>
<input type="file" formenctype="multipart/form-data" name="image3"/>
<input type="file" formenctype="multipart/form-data" name="image4"/>
<input type="file" formenctype="multipart/form-data" name="image5"/>
<input type="submit" value="save" />
</form>

有誰知道為什么在Win7下會發生這種情況？

編輯

執行腳本的python服務器看起來像

#!/usr/bin/env python
#-*- coding: ISO-8859-1 -*-

import http.server
import socketserver
import subprocess
import os
import time
import threading

import cgi
import cgitb; cgitb.enable()

try: # Windows needs stdio set for binary mode.
    import msvcrt
    msvcrt.setmode (0, os.O_BINARY) # stdin  = 0
    msvcrt.setmode (1, os.O_BINARY) # stdout = 1
except ImportError:
    pass

PORT = 8000

class MyHandler(http.server.CGIHTTPRequestHandler):

    # Disable logging DNS lookups
    def address_string(self):
        return str(self.client_address[0])


class ThreadingHTTPServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
    pass

if __name__=='__main__':

    #Handler = http.server.CGIHTTPRequestHandler
    Handler = MyHandler

    #httpd = http.server.HTTPServer(("", PORT), Handler)
    httpd = ThreadingHTTPServer(('localhost', 8000), Handler)

    print("serving at port", PORT)
    httpd.serve_forever()

Answer 1

try: # Windows needs stdio set for binary mode.
    import msvcrt
    msvcrt.setmode (0, os.O_BINARY) # stdin  = 0
    msvcrt.setmode (1, os.O_BINARY) # stdout = 1
except ImportError:
    pass

從此頁面： http ： //webpython.codepoint.net/cgi_file_upload